论文部分内容阅读
试验以NiMoB/γ-Al2O3为催化剂,在一定温度条件下,考察了对玉米秸秆快速热裂解油(生物油)的加氢提质效果。结果表明,在80℃下,生物油中部分代表性不饱和醛酮化合物(如糠醛、苯甲醛、环己酮、乙醛、乙酰丙酮等)可以在甲醇溶液中被高效地加氢转化为相应的醇。由于生物油中含水量高和各类不饱和化合物含量很低的原因,直接对生物油加氢时,只能部分地将其转化为饱和化合物。研究发现,生物油经超临界萃取处理获得的轻组分,其加氢能力明显增强,羰基化合物(C=O)和碳碳双键化合物(C=C)的转化率分别可达87%和70%。加氢过程中会伴有酯化反应,加氢处理生物油的酸度明显降低,热稳定性提高。
The NiMoB / γ-Al2O3 catalyst was used as a catalyst to investigate the effect of hydrogenation and quality improvement on corn stalks rapidly pyrolyzed oil (bio-oil) under certain temperature. The results showed that the partially unsaturated aldehydes and ketones (such as furfural, benzaldehyde, cyclohexanone, acetaldehyde and acetylacetone) in the bio-oil could be efficiently hydrogenated into methanol Of alcohol. Due to the high water content of bio-oil and the low content of various types of unsaturated compounds, direct bio-oil hydrogenation can only be partially converted to saturated compounds. The results showed that the light components obtained by supercritical extraction of bio-oil had a significantly higher hydrogenation capacity, and the conversions of carbonyl compounds (C = O) and carbon-carbon double bond compounds (C = C) 70%. During the hydrogenation process, esterification reaction will be accompanied. The acidity of the bio-oil is significantly reduced and the thermal stability is improved.